Nike Air Pegasus + 29 Shield - Black/Jade Running ShoesNike Air Pegasus + 29 revolutionised the concept of cushioning in shoes with it's patented 'Air' technology in 1979, and some of the most famous running shoes ever have featured the famous Swoosh logo, including the iconic Nike Air Pegasus.The sole unit of the Pegasus 29 is new. Very similar to the sole unit present in the Pegasus 25 and 26, this shoe has a Nike Air unit in the heel to absorb the impact of the heel to the ground. The midsole material went from Phylon to Cushlon, a Nike-developed foam that provides shock absorption but is resilient: the foam springs back and returns to its original shape, ready for the next step.